I agree,using quality parts is something everyone wants on their cars,but I still would like to hear from first hand experience about a product rather than someone else's assumption about it.If you've never used something,how can you give an honest description of it? The fact that factory parts are better than anything else is all crap IMO .Your talking about factory parts that were designed almost fifty years ago without the technology that is used today.Do you think the cell phone that your using today will be anything like the one you may be using forty years from now,highly doubt it! Manufacturing tolerances and materials have gotten so much better within the past forty years that there is a difference.As for weight,every few pounds counts when your driving a 4000 plus pound barge.What will your answer be when gas skyrockets to $6.00 or more per gallon in the future? Will you care about it then or just pay close to $200 to fill your gas tank? I'm all for restoring classic cars and try to keep things looking original,but to most of your average Joe's out there,when was the last time someone pulled you over while you were driving and asked to look under your hood? Most people wouldn't know the difference between a Chevy small block from a Mopar big block,let alone what color the engine should be painted.The only people who are familiar with this stuff are car enthusiasts.So whether your running a chrome engine block or using aluminum intake manifolds,etc.,who cares as long as it's doing the proper job.If it's originality your after,then find every NOS part they ever made,including tires,belts,hoses,battery,nuts,bolts,etc. and keep the car sealed in an airtight garage so nothing will ever happen to it,because as soon as you start using it your going to devalue it.Cars were meant to be driven and if you take proper care then you'll manage to get some good use(and looks)from the car that you drive and it may last another fifty years!